US7509950B2 - System for ventilation of an internal-combustion engine crankcase as well as a V-shaped internal combustion engine - Google Patents

System for ventilation of an internal-combustion engine crankcase as well as a V-shaped internal combustion engine Download PDF

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Publication number
US7509950B2
US7509950B2 US11/352,255 US35225506A US7509950B2 US 7509950 B2 US7509950 B2 US 7509950B2 US 35225506 A US35225506 A US 35225506A US 7509950 B2 US7509950 B2 US 7509950B2
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Prior art keywords
oil separation
oil
combustion engine
blow
module
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Expired - Fee Related, expires
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US11/352,255
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English (en)
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US20060180131A1 (en
Inventor
Frank Dieterle
Norman Woeckel
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Assigned to DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT reassignment DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DIETERLE, FRANK, WOECKEL, NORMAN
Publication of US20060180131A1 publication Critical patent/US20060180131A1/en
Assigned to DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT (COMPANY NUMBER 722287) reassignment DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT (COMPANY NUMBER 722287) MERGER (SEE DOCUMENT FOR DETAILS). Assignors: DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT
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Assigned to PORSCHE ZWISCHENHOLDING GMBH reassignment PORSCHE ZWISCHENHOLDING GMBH MERGER (SEE DOCUMENT FOR DETAILS). Assignors: DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT
Assigned to DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT reassignment DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: PORSCHE ZWISCHENHOLDING GMBH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers

Definitions

  • the present invention relates to a system for ventilating an internal-combustion engine crankcase as well as to such an internal-combustion engine, particularly having a V-shaped arrangement of the cylinders.
  • DE 101 54 669 A1 discloses an internal-combustion engine with at least two cylinder bank rows, in which oil separation chambers are provided on the interior side of the cylinder head covers for the crankcase ventilation.
  • the oil separation chambers are an integral component of the crankcase ventilation system.
  • An object of the present invention is to provide a still further improved crankcase ventilation system and the connected separation of oil from the blow-by gases in order to finally be able to return purified blow-by gases to the suction system of the internal-combustion engine.
  • At least one separate oil separation module whose oil separation chambers constructed therein have first openings for the introduction of the blow-by gases and second openings for the return of the separated oil into the cylinder head and a V-shaped internal combustion engine on which the oil separation module is arranged between a cylinder head cover of a cylinder bank row and the air intake module.
  • crankcase ventilation can be further improved.
  • the oil separation chamber integrated in the component module can be constructed to have a larger volume. As a result, a longer ventilation path can be implemented for the blow-by gases, so that the efficiency of the oil separation is further improved.
  • the transfer of the blow-by gases from the cylinder head into the oil separation chamber takes place via openings which, relative to the longitudinal dimension of the oil separation chamber, are arranged essentially in the center, while second openings for the return of the separated lubricating oil into the cylinder head are provided at the two respective ends of the oil separation chamber.
  • the opening cross-section for the transfer of the blow-by gases into the oil separation chamber is larger than the opening cross-section for the separated lubricating oil.
  • valves So that the blow-by gases are forced to enter the oil separation chamber via the central opening provided in the oil separation chamber, the return flow openings provided for the lubricating oil are monitored in a simple manner by valves. These valves open up a connection to the cylinder head or the camshaft space only when lubricating oil has collected in this area.
  • the valve which, for example, has a mushroom shape, as a result of gravitational force, then opens up the opening and thus the return flow to the camshaft space.
  • partitioning webs are provided to guide the blow-by gas in a labyrinth-type manner from the intake to the exhaust.
  • This labyrinth-type guidance of the blow-by gases allows the space in the oil separation chamber to optimally utilized.
  • the lengthening of the path for the blow-by gases from the intake to the exhaust connected therewith results in a further calming of the blow-by gases and thus to a better separation of the lubricating oil.
  • the component module for the oil separation has a trough-shaped basic body which is closed by a separate lid.
  • a space-saving arrangement for such an oil separation module which is suitable for a multi-row internal-combustion engine with a V-shaped arrangement of the cylinders, is obtained when one component module respectively is arranged in each case between a cylinder head cover of an internal-combustion engine and an air intake module placed centrally in the interior of the two cylinder bank rows.
  • the two oil separation chambers integrated in the oil separation modules are mutually connected by means of a hose assembly.
  • a pressure regulator is fastened whose output leads by way of a connection line to the suction pipe of the internal-combustion engine.
  • An additional oil separator is connected in front of the pressure regulator.
  • the oil separator as viewed in the flow direction of the blow-by gases, connects to the oil separation chamber integrated in the second oil separation module and is combined with the pressure regulator to form a constructional unit.
  • FIG. 1 is a front view of a V-shaped internal-combustion engine
  • FIG. 2 is a perspective view of two cylinder head covers of the internal-combustion engine of FIG. 1 as well as of an air intake module arranged between the two cylinders;
  • FIG. 3 is a top view of an oil separation system of the internal-combustion engine of FIG. 1 ;
  • FIG. 4 is a bottom plan view of the oil separation system of FIG. 3 ;
  • FIG. 5 is a sectional view along line V-V in FIG. 4 ;
  • FIG. 6 is a sectional view along line VI-VI in FIG. 4 ;
  • FIG. 7 is a side view of a second embodiment of an oil separation module.
  • FIG. 8 is a view of the oil separation module of FIG. 7 .
  • the internal-combustion engine constructed as a V8-engine has two cylinder bank rows 2 , 3 which are both integrated in a crankcase top half 4 which is adjoined by crankcase bottom half 5 further developed as a crankshaft bearing bridge.
  • a crankshaft 6 is disposed between the crankcase top half 4 and the crankcase bottom half 5 .
  • the two cylinder bank rows 2 , 3 have two respective cylinder heads 7 , 8 in which, among others, the intake camshafts 9 , 10 as well as the exhaust camshafts 11 , 12 are respectively accommodated and required for controlling the intake and exhaust valves respectively.
  • the intake camshafts 9 , 10 and the exhaust camshafts 11 , 12 are driven by a driving double gear wheel arranged on the crankshaft 6 and a timing chain 14 (schematically shown by dashed lines) constructed as an endless chain.
  • Both cylinder heads 7 , 8 are closed off toward the top by a cylinder head cover 16 , 18 respectively.
  • an air intake module 20 is arranged in which eight individual intake pipes 22 are constructed.
  • a central opening 24 constructed on the face side at the air intake module 20 and to which a suction pipe is connected, combustion air is fed by way of the individual intake pipes 22 to the individual cylinders.
  • one oil separation module 26 , 28 respectively is arranged.
  • the two oil separation modules 26 , 28 are integrated in a crankcase ventilation system which, in a generally well known manner, is responsible for the guidance of the blow-by gases, which are transferred during the combustion or during the compression cycle into the crankcase space of the internal-combustion engine, to the outside thereof and back to the intake system of the internal-combustion engine respectively.
  • the blow-by gases are caused to flow from the crankcase space into the camshaft space 17 of each cylinder head 7 , 8 .
  • connection piece 36 , 38 For guiding the blow-by gases from the camshaft space 17 into the oil separation chamber 30 , 31 constructed in the respective oil separation module 26 , 28 , one connection piece 36 , 38 respectively is constructed on a trough-shaped basic body 32 , 34 . With respect to the longitudinal dimension of the oil separation module 26 , 28 , each connection piece 36 , 38 is arranged essentially in the center and is fitted by way of two O-ring seals 40 , 42 ( FIG. 5 ) in a sealing manner into an opening in the cylinder head cover 16 , 18 .
  • Both oil separation modules 26 and 28 consisting of a plastic material have a lid 44 , 46 which bounds the oil separation chamber 30 in the upward direction and is fastened to the basic body 32 , 34 , for example, by friction welding method.
  • a lid 44 , 46 which bounds the oil separation chamber 30 in the upward direction and is fastened to the basic body 32 , 34 , for example, by friction welding method.
  • screws 48 penetrating the lid 44 , 46 and the basic body 32 , 34 , each oil separation module 26 , 28 is screwed to the cylinder head cover 16 , 18 .
  • one respective opening (hereinafter called air return flow openings 50 , 52 , 54 , 56 ) are provided at both ends of the oil separation chamber 30 , 31 .
  • These openings sealed off by corresponding O-rings 58 ( FIG. 6 ), correspond with openings (not shown) which are provided in the cylinder head cover 16 , 18 and are connected with the camshaft space 17 .
  • the oil return flow openings 50 , 52 , 54 , 56 are monitored by valves 60 constructed in a mushroom shape.
  • FIG. 3 shows the oil separation module 26 without the lid 44 , as seen in FIG. 2 .
  • a partitioning guide wall 62 , 64 which shaped out of the basic body 32 and 34 respectively in one piece, is provided in the two oil separation chambers 30 .
  • the partitioning guide wall 62 , 64 surrounds the respective intake opening 66 , 68 ( FIG. 4 ) and extends in the direction of the two oil return flow openings 50 , 54 placed in the basic body 32 , 34 .
  • the lid 44 , 46 is fastened on the basic body, for example, by the friction welding method or the like.
  • On the interior side of the lid 44 , 46 a corresponding receiving groove for the partitioning guide wall 62 , 64 is provided.
  • the two oil separation chambers 30 , 31 are connected with one another by a hose assembly 70 .
  • a funnel-shaped spiral oil separator 72 which is connected on its inlet side with the oil separation chamber 31 and, on its tapering end, has a discharge piece 73 (similar to the embodiment in FIG. 7 ) which is fitted into an opening of the cylinder head cover 18 .
  • a pressure regulator 74 is arranged on the spiral oil separator 72 , and, as required, reduces the vacuum in the crankcase space with respect to the vacuum existing in the suction system. The pressure regulator 74 is closed off in the upward direction by a lid 75 .
  • a pipe 76 is connected to the pressure regulator 74 and leads to a suction pipe (not shown) of the air intake module 20 .
  • the openings 50 , 52 , 54 , 56 are opened up only when the valves 60 are opened up because of the gravitational force of lubricating oil drops, which have collected in this area. Blow-by gases from the camshaft space 17 are prevented from arriving in an uncontrolled manner by way of the oil return flow openings 50 , 52 , 54 , 56 in the oil separation chambers 30 , 31 .
  • the blow-by gases in the oil separation chamber 30 are guided by the partitioning guide wall 62 first in the direction of the oil return flow opening in order to there, in a diverted manner, flow through the entire length of the oil separation chamber 30 and, by way of the hose assembly 70 , arrive in the oil separation chamber 31 .
  • the blow-by gases introduced by way of the connection piece 38 are analogously to the oil separation chamber 30 guided by the partitioning guide wall 62 , and, together with the blow-by gases transferred from the oil separation chamber 30 , are guided to the spiral oil separator 72 . If necessary, another purification of the blow-by gases takes place there, before, the blow-by gases are returned, by way of the pressure regulator 74 as well as by way of the pipe 76 , into the intake line of the internal-combustion engine.
  • valves 60 illustrated in FIG. 6 which monitor the oil return flow or the oil return flow openings 50 , 52 , 54 56 , can also be eliminated, as illustrated in the second embodiment shown in FIGS. 7 and 8 .
  • discharge connection pieces 78 are molded to the basic body 32 , 34 of the two oil separation modules 26 , 28 .
  • oil return flow openings 50 ′, 52 ′, 54 ′, 56 ′ are arranged and preferably have a slot-type construction.
  • the openings 50 ′, 52 ′, 54 ′, 56 ′ are dimensioned such that, because of the adhesion forces acting between the oil drops and the edges of the openings 50 ′, 52 ′, 54 ′, 56 ′, it is ensured that the openings 50 ′, 52 ′, 54 ′, 56 ′ are always closed by dripping-off oil, so that no blow-by gases can be transferred by way of these openings into the oil separation chamber 30 , 31 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
US11/352,255 2005-02-12 2006-02-13 System for ventilation of an internal-combustion engine crankcase as well as a V-shaped internal combustion engine Expired - Fee Related US7509950B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005006438A DE102005006438A1 (de) 2005-02-12 2005-02-12 Einrichtung zur Entlüftung eines Kurbelgehäuses einer Brennkraftmaschine sowie Brennkraftmaschine mit insbesondere V-förmiger Anordnung der Zylinder
DE102005006438.8 2005-02-12

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US20060180131A1 US20060180131A1 (en) 2006-08-17
US7509950B2 true US7509950B2 (en) 2009-03-31

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US (1) US7509950B2 (de)
EP (1) EP1691043A3 (de)
JP (1) JP2006220149A (de)
DE (1) DE102005006438A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090266326A1 (en) * 2008-04-24 2009-10-29 Gm Global Technology Operations, Inc. Air intake assembly with integrated crankcase ventilation system
US20150275719A1 (en) * 2012-10-02 2015-10-01 Nissan Motor Co., Ltd. Device for processing blow-by from v-type internal combustion engines
RU2585127C2 (ru) * 2014-09-23 2016-05-27 Олег Николаевич ГОЛОВАЧ Клапанная крышка для двигателей внутреннего сгорания
US10267269B1 (en) * 2013-12-09 2019-04-23 High Output Technology, LLC Venting method for engine crankcases

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008024874B4 (de) * 2008-05-23 2016-12-29 Audi Ag Brennkraftmaschine mit einem eine Entlüftung aufweisenden Kurbelgehäuse
US8256405B2 (en) * 2008-06-13 2012-09-04 Kohler Co. Breather assembly with standpipe for an internal combustion engine
DE102008029904A1 (de) * 2008-06-24 2009-12-31 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung und Verfahren zur Kurbelgehäuseentlüftung
JP5473863B2 (ja) * 2010-11-01 2014-04-16 小島プレス工業株式会社 オイルセパレータとシリンダヘッドカバーのシール構造
CN102733888A (zh) * 2011-04-02 2012-10-17 重庆长安汽车股份有限公司 一种发动机曲轴箱通风系统的迷宫结构
US8887704B2 (en) * 2012-04-17 2014-11-18 GM Global Technology Operations LLC Engine assembly with engine block-mounted air-oil separator and method of ventilating an engine crankcase

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US5024203A (en) * 1990-08-22 1991-06-18 Sealed Power Technologies, L.P. PCV oil separator system
JPH08158853A (ja) 1994-12-05 1996-06-18 Tsuchiya Mfg Co Ltd ブローバイガスにおけるオイルの分離装置
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090266326A1 (en) * 2008-04-24 2009-10-29 Gm Global Technology Operations, Inc. Air intake assembly with integrated crankcase ventilation system
US8464698B2 (en) 2008-04-24 2013-06-18 GM Global Technology Operations LLC Air intake assembly with integrated crankcase ventilation system
US20150275719A1 (en) * 2012-10-02 2015-10-01 Nissan Motor Co., Ltd. Device for processing blow-by from v-type internal combustion engines
US9243529B2 (en) * 2012-10-02 2016-01-26 Nissan Motor Co., Ltd. Device for processing blow-by from V-type internal combustion engines
US10267269B1 (en) * 2013-12-09 2019-04-23 High Output Technology, LLC Venting method for engine crankcases
RU2585127C2 (ru) * 2014-09-23 2016-05-27 Олег Николаевич ГОЛОВАЧ Клапанная крышка для двигателей внутреннего сгорания

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DE102005006438A1 (de) 2006-08-17
US20060180131A1 (en) 2006-08-17
EP1691043A2 (de) 2006-08-16
EP1691043A3 (de) 2010-03-24
JP2006220149A (ja) 2006-08-24

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